CN110594838A - Solar heat pump combined heating system and control method - Google Patents
Solar heat pump combined heating system and control method Download PDFInfo
- Publication number
- CN110594838A CN110594838A CN201810607354.0A CN201810607354A CN110594838A CN 110594838 A CN110594838 A CN 110594838A CN 201810607354 A CN201810607354 A CN 201810607354A CN 110594838 A CN110594838 A CN 110594838A
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- Prior art keywords
- heat exchanger
- water
- air
- heat pump
- heating system
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0228—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with conventional heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The invention discloses a solar heat pump combined heating system and a control method. Comprises an air type solar heat collector, a gas-water heat exchanger, a heat pump unit, an electric heater and a fan coil; the air-water heat exchanger is connected with an air outlet of the air type solar heat collector; the heat pump unit is connected with the gas-water heat exchanger and is used for auxiliary heating when the temperature of the gas-water heat exchanger is lower than a first preset temperature value and higher than a second preset temperature value; the electric heater is respectively connected with the heat pump unit and the fan coil, and is used for assisting in heating when the temperature of the gas-water heat exchanger is lower than the second preset temperature value. The heat pump unit and the electric heater can be used for auxiliary heating, so that the air can be accelerated to reach the conversion efficiency of hot water supply, the energy utilization rate is improved, the output water supply temperature can be effectively guaranteed to meet the user demand, and the user experience is improved.
Description
Technical Field
The invention relates to the fields of heat supply technology and energy storage, in particular to a solar heat pump combined heating system and a control method of the solar heat pump combined heating system.
Background
China belongs to one of countries with abundant solar energy resources, the annual sunshine hours in areas above 2/3 in the whole country are more than 2000h, the solar radiation heat received by land every year is equivalent to the heat released by burning 2.4 trillion tons of standard coal, and the solar energy utilization condition is good; the solar heating system takes solar energy as a heat source of the heating system, and utilizes the solar heat collector to convert the solar energy into heat energy to supply the heat energy for winter heating of buildings and hot water for life all the year round; germany is a country where solar heating technology was earlier applied, which has been widely used in the transformation and supporting construction of heating facilities in germany residential areas; the Yuan Lei designs a heating system which mainly uses solar energy and is assisted by a heat pump, and the result shows that the method can improve the COP (coefficient of performance) of the heat pump unit and the operation efficiency of the system.
In the central heating process of the conventional energy storage type air heat collector, when the solar radiation intensity is insufficient, the internal temperature of the heat collector begins to drop, and after the temperature drops below 70 ℃, the efficiency of exchanging heat in the heat collector to heating circulating hot water through a gas-water heat exchanger is sharply reduced, so that the heating effect is poor.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a solar heat pump combined heating system and a control method of the solar heat pump combined heating system.
In order to achieve the above object, a first aspect of the present invention provides a solar heat pump combined heating system, which includes an air type solar heat collector, a gas-water heat exchanger, a heat pump unit, an electric heater and a fan coil;
the air-water heat exchanger is connected with an air outlet of the air type solar heat collector;
the heat pump unit is connected with the air-water heat exchanger and used for assisting in heating when the actual temperature in the air type solar heat collector is lower than a first preset temperature value and higher than a second preset temperature value;
the electric heater is respectively connected with the heat pump unit and the fan coil, and is used for assisting in heating when the actual water temperature of the air-water heat exchanger is lower than the second preset temperature value.
Optionally, the air-type solar heat collector comprises a vacuum tube and a phase-change energy storage core arranged in the vacuum tube.
Optionally, the heat pump unit comprises an evaporation heat exchanger, an electronic expansion valve, a condensation heat exchanger and a compressor;
the inlet of the evaporation heat exchanger is connected with the condensation heat exchanger through the electronic expansion valve, the outlet of the evaporation heat exchanger is connected with the compressor, and the outlet of the condensation heat exchanger is respectively connected with the gas-water heat exchanger and the electric heater through an electric three-way valve.
Optionally, the evaporation heat exchanger and the gas-water heat exchanger are located in the same box, and both the evaporation heat exchanger and the gas-water heat exchanger utilize solar radiation heat.
Optionally, a thermal insulation material is arranged outside the box body.
Optionally, the electric heater comprises a heating body and an energy storage material disposed within the heating body.
Optionally, the system further comprises an expansion water tank and a circulating water pump;
the expansion water tank and the circulating water pump are both connected with a water return pipe of the fan coil.
Optionally, a temperature sensor and a control unit are further included;
the temperature sensor is used for respectively detecting the actual temperature in the air type solar heat collector and the actual water temperature of the air-water heat exchanger and sending the actual temperature and the actual water temperature to the control unit;
the control unit is used for receiving the actual temperature and controlling the working state of the heat pump unit according to the actual temperature, and,
and the electric heater is used for receiving the actual water temperature and controlling the working state of the electric heater according to the actual water temperature.
Optionally, the control unit comprises a PLC.
In a second aspect of the present invention, a control method for a solar heat pump combined heating system is provided, where the solar heat pump combined heating system includes the solar heat pump combined heating system described above; the control method comprises the following steps:
s1, controlling the air type solar heat collector to heat the air-water heat exchanger;
s2, respectively detecting the actual temperature in the air type solar heat collector and the actual water temperature of the air-water heat exchanger;
s3, judging whether the actual temperature in the air type solar heat collector is lower than a first preset temperature value and higher than a second preset temperature value, if so, executing S4, and if not, executing S5;
s4, starting the heat pump unit to perform auxiliary heating;
s5, judging whether the actual water temperature of the gas-water heat exchanger is lower than a second preset temperature value, if so, executing S6, and if not, executing S1;
and S6, starting the electric heater for auxiliary heating, and controlling the heat pump unit to stop running.
The invention discloses a solar heat pump combined heating system and a control method. Not only including air formula solar collector, still include heat pump set and electric heater, can utilize the heat pump set up like this with electric heater carries out the boosting to can accelerate the air and reach the conversion efficiency of heat supply water, improve solar heat utilization rate, can also effectively guarantee simultaneously that the water supply temperature who outputs satisfies user demand, improve user experience.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a solar heat pump combined heating system according to a first embodiment of the present invention;
fig. 2 is a flowchart of a control method of a solar heat pump cogeneration system in a second embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, a first aspect of the present invention relates to a solar heat pump combined heating system, which includes an air type solar heat collector 1, a gas-water heat exchanger 5, a heat pump unit, an electric heater 10 and a fan coil 13.
The air-water heat exchanger 5 is connected with an air outlet of the air type solar heat collector 1. The heat pump unit is connected with the gas-water heat exchanger 5 and is used for assisting in heating when the actual temperature in the air type solar heat collector 1 is lower than a first preset temperature value and higher than a second preset temperature value.
The electric heater 10 is respectively connected with the heat pump unit and the fan coil 13, and the electric heater 10 is used for assisting in heating when the actual water temperature of the gas-water heat exchanger 5 is lower than the second preset temperature value.
Specifically, when heating is performed by the solar heat pump combined heating system having the configuration of the present embodiment, first, solar energy is collected by the air-type solar heat collector 1 to heat air in the air-type solar heat collector 1, and the heated air enters the air-water heat exchanger 5 to heat water supplied to the air-water heat exchanger 5. That is, in the gas-water heat exchanger 5, the supplied water exchanges heat with the air. In this way, in the case of sufficient sunlight, the supply water can be sent directly to the user terminal. However, in the case where the sunshine is insufficient, for example, in rainy or snowy weather, the water may not be heated to the supply water temperature that meets the user's demand by using only the air type solar collector 1. At this time, auxiliary heating needs to be carried out by means of the heat pump unit, so that the water supply can meet the requirements of users. However, when the temperature of the supplied water heated by the air-type solar collector 1 is extremely low, for example, lower than the set second preset temperature value, at this time, if the heat pump unit is reused for heating, the load of the heat pump unit is increased, and the service life of the heat pump unit is rapidly reduced, at this time, the electric heater 10 may be used for auxiliary heating, so that the supplied water can rapidly reach the supplied water temperature required by the user.
It should be noted that, neither the first preset temperature value nor the second preset temperature value is specifically limited, for example, the first preset temperature value may be 70 ℃, and the second preset temperature value may be 10 ℃. Of course, those skilled in the art can determine specific values of the first preset temperature value and the second preset temperature value according to actual needs.
The solar heat pump combined heating system with the structure of the embodiment not only comprises the air type solar heat collector, but also comprises the heat pump unit and the electric heater, so that the set heat pump unit and the electric heater can be utilized for carrying out auxiliary heating, the air can be accelerated to reach the conversion efficiency of hot water supply, the solar heat utilization rate is improved, meanwhile, the output water supply temperature can be effectively guaranteed to meet the user requirements, and the user experience is improved.
Specifically, as shown in fig. 1, the air-type solar heat collector 1 comprises a vacuum tube and a phase-change energy storage core 2 arranged in the vacuum tube. The phase-change energy storage core 2 is used for storing heat when solar energy is excessive, releasing heat when the solar energy is insufficient, and stabilizing the output of heat energy and the utilization rate of the solar energy. The phase-change energy storage core 2 can be a storage battery and the like.
As shown in fig. 1, the heat pump unit includes an evaporation heat exchanger 4, an electronic expansion valve 6, a condensation heat exchanger 8 and a compressor 9. That is, the evaporation heat exchanger 4, the electronic expansion valve 6, the condensation heat exchanger 8 and the compressor 9 constitute a complete heat pump unit structure.
The inlet of the evaporation heat exchanger 4 is connected with the condensation heat exchanger 8 through the electronic expansion valve 6, the outlet of the evaporation heat exchanger 4 is connected with the compressor 9, and the outlet of the condensation heat exchanger 8 is respectively connected with the gas-water heat exchanger 5 and the electric heater 10 through the electric three-way valve 7.
Specifically, in order to simplify the structure of the solar heat pump combined heating system, the evaporation heat exchanger 4 may be located in the same box as the gas-water heat exchanger 5 (for example, as shown in fig. 1, the gas-water heat exchanger 5 is located at the upper portion of the box, and the evaporation heat exchanger 4 is located at the lower portion of the box), and both the evaporation heat exchanger 4 and the gas-water heat exchanger 5 utilize solar radiation heat. In addition, in order to normally operate at extremely low temperature, the box body can be subjected to heat preservation treatment, for example, the box body is externally provided with a heat preservation material. In this way, heat loss can be avoided.
Preferably, the electric heater 10 includes a heating body and an energy storage material disposed within the heating body.
Specifically, the electric heater 10 may heat during a time period when electricity prices are relatively inexpensive, for example, at night (23: 00 ~ 06: 00), so that the energy storage material may absorb electric energy and be stored in the form of thermal energy, so that when the temperature of the gas-water heat exchanger 5 is lower than the second preset temperature value, rapid heating may be achieved using the stored energy, satisfying the water supply requirement.
As shown in fig. 1, the system further comprises an expansion water tank 12 and a circulating water pump 11. The expansion water tank 12 and the circulating water pump 11 are both connected with a water return pipe of the fan coil 13. The circulating water pump 11 may power the circulating water supply.
Preferably, a temperature sensor (not shown) and a control unit (not shown) are also included. The temperature sensor is configured to detect an actual temperature in the air-type solar thermal collector 1 and an actual water temperature of the air-water heat exchanger 5, and send the actual temperatures to the control unit. And the control unit is used for receiving the actual temperature and controlling the working state of the heat pump unit according to the actual temperature, and receiving the actual water temperature and controlling the working state of the electric heater 10 according to the actual water temperature.
Preferably, the control unit comprises a PLC. Of course, the control unit may have other control structures besides the PLC.
In a second aspect of the present invention, as shown in fig. 1 and fig. 2, a control method of a solar heat pump combined heating system is provided, wherein the solar heat pump combined heating system comprises the solar heat pump combined heating system described above. The control method comprises the following steps:
s1, controlling the air type solar heat collector 1 to heat the air-water heat exchanger 5;
s2, respectively detecting the actual temperature in the air type solar heat collector 1 and the actual water temperature of the air-water heat exchanger 5;
s3, judging whether the actual temperature in the air type solar heat collector 1 is lower than a first preset temperature value and higher than a second preset temperature value, if so, executing S4, and if not, executing S5;
s4, starting the heat pump unit to perform auxiliary heating;
s5, judging whether the actual water temperature of the gas-water heat exchanger 5 is lower than a second preset temperature value, if so, executing S6, and if not, executing S1;
and S6, starting the electric heater 10 to perform auxiliary heating, and controlling the heat pump unit to stop running.
Specifically, the control method can be divided into four modes, namely a direct heating mode of the air type solar heat collector 1, a combined heating mode of the air type solar heat collector 1 and the heat pump unit, an individual heating mode of the heat pump unit and an auxiliary combined heating mode of the electric heater 10. Each mode is switched with the temperature in the gas-water heat exchanger 5.
The control method of the solar heat pump combined heating system with the structure of the embodiment can control the system to switch between the direct heating mode of the air type solar heat collector 1, the combined heating mode of the air type solar heat collector 1 and the heat pump unit, the independent heating mode of the heat pump unit and the auxiliary combined heating mode of the electric heater 10 according to the temperatures in the air heat collector and the air-water heat exchanger 5, so that the air can be accelerated to reach the conversion efficiency of supplying hot water, the energy utilization rate is improved, meanwhile, the output water supply temperature can be effectively guaranteed to meet the user requirements, and the user experience is improved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A solar heat pump combined heating system is characterized by comprising an air type solar heat collector, a gas-water heat exchanger, a heat pump unit, an electric heater and a fan coil;
the air-water heat exchanger is connected with an air outlet of the air type solar heat collector;
the heat pump unit is connected with the air-water heat exchanger and used for assisting in heating when the actual temperature in the air type solar heat collector is lower than a first preset temperature value and higher than a second preset temperature value;
the electric heater is respectively connected with the heat pump unit and the fan coil, and is used for assisting in heating when the actual water temperature of the air-water heat exchanger is lower than the second preset temperature value.
2. A solar heat pump combined heating system according to claim 1, wherein the air-type solar collector comprises a vacuum tube and a phase change energy storage core disposed within the vacuum tube.
3. A solar thermal pump combined heating system according to claim 1, wherein the heat pump unit comprises an evaporation heat exchanger, an electronic expansion valve, a condensation heat exchanger, and a compressor;
the inlet of the evaporation heat exchanger is connected with the condensation heat exchanger through the electronic expansion valve, the outlet of the evaporation heat exchanger is connected with the compressor, and the outlet of the condensation heat exchanger is respectively connected with the gas-water heat exchanger and the electric heater through an electric three-way valve.
4. A solar heat pump combined heating system according to claim 3, wherein the evaporation heat exchanger and the gas-water heat exchanger are located in the same box, and both the evaporation heat exchanger and the gas-water heat exchanger use solar radiation heat.
5. A solar heat pump combined heating system according to claim 4, wherein a thermal insulation material is provided outside the box body.
6. A solar thermal pump combined heating system according to any one of claims 1 to 5, wherein the electric heater comprises a heating body and an energy storage material disposed within the heating body.
7. A solar thermal pump combined heating system according to any one of claims 1 to 5, further comprising an expansion tank and a circulating water pump;
the expansion water tank and the circulating water pump are both connected with a water return pipe of the fan coil.
8. A solar thermal pump combined heating system according to any one of claims 1 to 5, further comprising a temperature sensor and a control unit;
the temperature sensor is used for respectively detecting the actual temperature in the air type solar heat collector and the actual water temperature of the air-water heat exchanger and sending the actual temperature and the actual water temperature to the control unit;
the control unit is used for receiving the actual temperature and controlling the working state of the heat pump unit according to the actual temperature, and,
and the electric heater is used for receiving the actual water temperature and controlling the working state of the electric heater according to the actual water temperature.
9. A solar heat pump combined heating system according to claim 8, wherein the control unit comprises a PLC.
10. A control method of a solar heat pump combined heating system, characterized in that the solar heat pump combined heating system comprises the solar heat pump combined heating system according to any one of claims 1 to 9; the control method comprises the following steps:
s1, controlling the air type solar heat collector to heat the air-water heat exchanger;
s2, respectively detecting the actual temperature in the air type solar heat collector and the actual water temperature of the air-water heat exchanger;
s3, judging whether the actual temperature in the air type solar heat collector is lower than a first preset temperature value and higher than a second preset temperature value, if so, executing S4, and if not, executing S5;
s4, starting the heat pump unit to perform auxiliary heating;
s5, judging whether the actual water temperature of the gas-water heat exchanger is lower than a second preset temperature value, if so, executing S6, and if not, executing S1;
and S6, starting the electric heater for auxiliary heating, and controlling the heat pump unit to stop running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607354.0A CN110594838A (en) | 2018-06-13 | 2018-06-13 | Solar heat pump combined heating system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607354.0A CN110594838A (en) | 2018-06-13 | 2018-06-13 | Solar heat pump combined heating system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110594838A true CN110594838A (en) | 2019-12-20 |
Family
ID=68849599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810607354.0A Withdrawn CN110594838A (en) | 2018-06-13 | 2018-06-13 | Solar heat pump combined heating system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631137A (en) * | 2018-12-07 | 2019-04-16 | 江苏星云物联科技有限公司 | A kind of method and heating system for realizing air type solar energy heating |
| CN114674027A (en) * | 2022-04-02 | 2022-06-28 | 重庆大学 | Solar energy and low-temperature air source heat pump auxiliary type phase change heat storage and supply system and method |
-
2018
- 2018-06-13 CN CN201810607354.0A patent/CN110594838A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631137A (en) * | 2018-12-07 | 2019-04-16 | 江苏星云物联科技有限公司 | A kind of method and heating system for realizing air type solar energy heating |
| CN114674027A (en) * | 2022-04-02 | 2022-06-28 | 重庆大学 | Solar energy and low-temperature air source heat pump auxiliary type phase change heat storage and supply system and method |
| CN114674027B (en) * | 2022-04-02 | 2023-08-11 | 重庆大学 | Solar energy and low-temperature air source heat pump auxiliary type phase-change heat storage and supply system and method |
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Application publication date: 20191220 |